The sunlight in the last pic shows the feather color much better, and currently thinking that could indeed be a cockerel. Plus they are usually the friendliest/favorite. :hmm
Plan to give it at least 2 more weeks but start making your plans for rehoming is what I would do. The beard inhibits...
Both look like cockerels for the stated age. Tail feathers are irrelevant at this point, it's all about comb color and size.
The dark one looks male in the comb department. The brown one looks like it could just be flushed. I also don't see reds or oranges shining through the feather pattern on...